129808578816 has 648 divisors, whose sum is σ = 466780758080. Its totient is φ = 33867030528.

The previous prime is 129808578791. The next prime is 129808578821. The reversal of 129808578816 is 618875808921.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1213164235 + ... + 1213164341.

Almost surely, 2^129808578816 is an apocalyptic number.

129808578816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129808578816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233390379040).

129808578816 is an abundant number, since it is smaller than the sum of its proper divisors (336972179264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129808578816 is a wasteful number, since it uses less digits than its factorization.

129808578816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 63.

The spelling of 129808578816 in words is "one hundred twenty-nine billion, eight hundred eight million, five hundred seventy-eight thousand, eight hundred sixteen".